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Frank Barchard 9c5d5c1e55 InterpolateRow_NEON/SVE2 and InterpolateRow_16_NEON/SVE2 use 2 registers 
Replace rshrn2 with 2 8 byte registers and stp

All benchmarks run at 1280×720, 1000 iterations (taskset c0):

Function (1280x720 1000x)     | OldNEON | NewNEON | OldSVE2 | NewSVE2
-------------------------------+---------+---------+---------+--------
TestInterpolatePlane (8-bit)   |   76 ms |   66 ms |  125 ms |   34 ms
TestInterpolatePlane_16        |  195 ms |   66 ms |  195 ms |   64 ms
TestARGBInterpolate (50/50)    |  104 ms |  104 ms |  128 ms |   89 ms
ARGBInterpolate0_Opt (0%)      |  133 ms |  128 ms |  148 ms |  145 ms
ARGBInterpolate64_Opt (25%)    |  211 ms |  181 ms |  244 ms |  222 ms
ARGBInterpolate128_Opt (50%)   |  182 ms |  178 ms |  278 ms |  176 ms
ARGBInterpolate192_Opt (75%)   |  211 ms |  173 ms |  223 ms |  209 ms
ARGBInterpolate255_Opt (99%)   |  211 ms |  183 ms |  315 ms |  221 ms
──────

Function (1280x720 1000x)     | OldNEON | NewNEON | OldSVE2 | NewSVE2
-------------------------------+---------+---------+---------+--------
TestInterpolatePlane (8-bit)   |  164 ms |  124 ms |  119 ms |   50 ms
TestInterpolatePlane_16        |  211 ms |  129 ms |  138 ms |   75 ms
TestARGBInterpolate (50/50)    |  159 ms |  159 ms |  210 ms |  166 ms
ARGBInterpolate0_Opt (0%)      |   92 ms |   92 ms |  148 ms |  138 ms
ARGBInterpolate64_Opt (25%)    |  223 ms |  223 ms |  232 ms |  232 ms
ARGBInterpolate128_Opt (50%)   |  130 ms |  130 ms |  232 ms |  195 ms
ARGBInterpolate192_Opt (75%)   |  223 ms |  223 ms |  232 ms |  232 ms
ARGBInterpolate255_Opt (99%)   |  223 ms |  223 ms |  232 ms |  232 ms

Platform            | NEON   | SVE2   | Result
--------------------+--------+--------+---------------
MediaTek Cortex-C1  | 47 ms  | 34 ms  | SVE2 1.38x win
Qualcomm Oryon v3   | 87 ms  | 73 ms  | SVE2 1.19x win

Testing:
blaze test --config=android_arm64 //third_party/libyuv:libyuv_test --test_filter="*TestInterpolatePlane*"

Bug: None
Change-Id: I503ce5a1269da5e1c5950c6a2c5ce81ddf4aaca5
Reviewed-on: https://chromium-review.googlesource.com/c/libyuv/libyuv/+/8216829
Commit-Queue: Frank Barchard <fbarchard@google.com>
Reviewed-by: George Steed <george.steed@arm.com>
Reviewed-by: Wan-Teh Chang <wtc@google.com>
2026-08-08 12:59:08 -07:00
build_overrides [tracing] Remove enable_base_tracing 2025-05-15 01:22:38 -07:00
docs Mirrow AVX2 functions for Visual C 2026-05-15 15:05:31 -07:00
include Harden I21xToI420 against oversize heights 2026-08-08 12:11:18 -07:00
infra/config Use default xcode version in libyuv 2025-11-24 07:54:14 -08:00
riscv_script Support RVV v0.12 intrinsics for row_rvv.cc & scale_rvv.cc 2024-06-17 18:01:49 +00:00
source InterpolateRow_NEON/SVE2 and InterpolateRow_16_NEON/SVE2 use 2 registers 2026-08-08 12:59:08 -07:00
tools_libyuv Remove libyuv dependency on base/ 2025-01-08 09:04:21 -08:00
unit_test Harden I21xToI420 against oversize heights 2026-08-08 12:11:18 -07:00
util vdpphps use emit to support old compilers 2026-07-06 15:51:14 -07:00
.clang-format clang-format libyuv 2016-11-07 17:37:23 -08:00
.gitignore DetilePlane and unittest for NEON 2022-01-31 20:05:55 +00:00
.gn Set use_siso=true by default in .gn 2025-06-23 23:50:32 -07:00
.vpython3 [libyuv] Bump vpython from 3.8 to 3.11 2025-09-03 12:22:19 -07:00
Android.bp Deprecate MIPS and MSA support. 2025-10-16 12:20:40 -07:00
Android.mk Android.mk: add a check for NDK_ROOT 2026-06-03 17:00:30 -07:00
AUTHORS [DEPS] Remove cleanup_links pre_deps_hooks 2024-04-08 15:47:48 +00:00
BUILD.bazel Add Bazel build support 2026-04-15 18:20:26 -07:00
BUILD.gn [libyuv] Fix toolchain dependency for Windows x64 2026-07-14 08:37:10 -07:00
CM_linux_packages.cmake Use grep extended regex for version 2024-11-13 02:11:17 +00:00
CMakeLists.txt Deprecate MIPS and MSA support. 2025-10-16 12:20:40 -07:00
codereview.settings [infra] remove no longer supported git cl upload setting. 2021-04-28 12:47:52 +00:00
DEPS Roll chromium_revision 30d4d9c779..2fec1883d8 (1554090:1584384) 2026-02-12 23:42:06 -08:00
DIR_METADATA Move metadata in OWNERS files to DIR_METADATA files 2021-02-09 19:34:43 +00:00
download_vs_toolchain.py Update pylintrc to a pep-8 like style 2024-12-18 05:38:56 -08:00
GEMINI.md SVE2 row functions needed for multipass image functions 2026-08-06 12:40:26 -07:00
libyuv.bzl Add Bazel build support 2026-04-15 18:20:26 -07:00
libyuv.gni row_win.cc rewrite into intrinsics 2026-04-15 19:53:16 -07:00
libyuv.gyp Stop setting --dynamic-linker for target_os="android" 2026-05-27 04:34:07 -07:00
libyuv.gypi Add missing files for riscv64 GYP build 2026-06-03 20:11:31 -07:00
LICENSE Update Copyright notice to follow new chromium conventions. 2012-08-08 19:04:24 +00:00
linux.mk Deprecate MIPS and MSA support. 2025-10-16 12:20:40 -07:00
OWNERS row_win.cc rewrite into intrinsics 2026-04-15 19:53:16 -07:00
PATENTS LibYuv: Adding PATENT and LICENSE files 2011-10-25 16:15:49 +00:00
PRESUBMIT.py Update pylintrc to a pep-8 like style 2024-12-18 05:38:56 -08:00
public.mk use unix line endings 2018-06-20 23:19:59 +00:00
pylintrc Update pylintrc to a pep-8 like style 2024-12-18 05:38:56 -08:00
README.chromium Harden I21xToI420 against oversize heights 2026-08-08 12:11:18 -07:00
README.md Update README.md and environment_variables.md for Arm 2024-09-20 00:29:33 +00:00
winarm.mk NV12 Copy, include scale_uv.h 2020-12-08 18:54:16 +00:00
WORKSPACE.bazel Add Bazel build support 2026-04-15 18:20:26 -07:00

README.md

libyuv is an open source project that includes YUV scaling and conversion functionality.

  • Scale YUV to prepare content for compression, with point, bilinear or box filter.
  • Convert to YUV from webcam formats for compression.
  • Convert to RGB formats for rendering/effects.
  • Rotate by 90/180/270 degrees to adjust for mobile devices in portrait mode.
  • Optimized for SSSE3/AVX2 on x86/x64.
  • Optimized for Neon/SVE2/SME on Arm.
  • Optimized for MSA on Mips.
  • Optimized for RVV on RISC-V.

Development

See Getting started for instructions on how to get started developing.

You can also browse the docs directory for more documentation.